/*
 * Copyright (C) 2014 hu
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package test.souplang.nodes;

import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import test.souplang.Context;
import test.souplang.LangNode;

/**
 * 
 * @author hu
 */
public class SLElements extends LangNode {
	public static final Logger LOG = LoggerFactory.getLogger(SLElements.class);

	public String cssSelector = null;

	public void readCSSSelector(org.w3c.dom.Element xmlElement) {
		cssSelector = xmlElement.getAttribute("selector");
		if (cssSelector.isEmpty()) {
			cssSelector = null;
		}
	}

	@Override
	public Object process(Object input, Context context) throws InputTypeErrorException {

		Element jsoupElement = null;
		Elements jsoupElements = null;

		if (input instanceof Element) {
			jsoupElement = (Element) input;
		} else {
			jsoupElements = (Elements) input;
		}

		if (cssSelector != null && !cssSelector.isEmpty()) {

			Elements result;
			if (jsoupElement != null) {
				result = jsoupElement.select(cssSelector);
			} else {
				result = jsoupElements.select(cssSelector);
			}
			// System.out.println("this is element" + result);
			return result;
		} else {
			return input;
		}

	}

	@Override
	public boolean validate(Object input) throws Exception {
		if (!(input instanceof Element) && !(input instanceof Elements)) {
			return false;
		}
		return true;
	}

}
